メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((134.994918148588 34.9847453820777, 134.994715432698 34.9838414193822, 134.994987400751 34.9837177472628, 134.995107400918 34.9837008954694, 134.99529508508 34.9836890279668, 134.995518934984 34.9847726772107, 134.994918148588 34.9847453820777)) ^^http://www.opengis.net/ont/geosparql#wktLiteral